Potion of Blunt/Pierce Defense is created by combining the reagents shown below in a Chemistry Lab. Note: If the third reagent slot is shown empty, this means that any reagent can be placed in that slot (You still need to have all three reagent slots filled to be able to create a potion).
Bird Beak + Gunpowder
Bird Beak + Magical Powder
The duration of the Potion of Blunt/Pierce Defense is as follows: